President Obama and Veterans Affairs Secretary Robert McDonald visit the veterans hospital in Phoenix Friday to announce a new outside advisory committee to help the VA with customer service. A scandal last year at the Phoenix facility led to revelations of long wait times for veterans throughout the VA medical system.

Ask Americans if someone in their family served in the military, and the answer is probably no. After all, fewer than 1 percent of Americans serve these days.

But ask if one of their grandfathers served, and you'll likely get a different answer. Between World War II and the wars in Korea and Vietnam, millions of men were drafted into service — and both men and women volunteered.

NPR — along with seven public radio stations around the country — is chronicling the lives of America's troops where they live. We're calling the project "Back at Base."This is the first of a three-part series about veteran benefits (Part 2 / Part 3).

Basetrack began as a place for embedded journalists to post photos. Later it became a social media site where families could keep up with their troops in Afghanistan. Now it has transformed again, into a new way for the most recent generation of veterans to tell the story of their service and survival.